What is alloy steel casting

The alloy steel used in the casting state is also called cast alloy steel. Alloy cast steel is divided into cast alloy structural steel and special-purpose alloy cast steel according to its use. The former is low and medium alloy cast steel, which is mainly used to make general mechanical structural parts. The latter are mostly high alloy cast steel, such as wear-resistant cast steel, rust and acid resistant cast steel, heat-resistant cast steel, cast alloy tool steel, etc.

Casting properties of the cast alloy structural steel and special low alloy cast steel are similar to those of the carbon cast steel. Chromium and molybdenum in steel reduce the fluidity of molten steel. Copper, manganese and nickel improve the fluidity. Volume shrinkage of the steel is mainly related to carbon content. The higher the carbon content, the larger the shrinkage, and the smaller the effect of alloying elements on it. Manganese and elements refining crystal structure such as vanadium, titanium and zirconium can reduce the hot cracking tendency, while chromium and molybdenum can increase the hot cracking tendency. Alloy elements reduce the thermal conductivity and increase the casting stress, which increases the cold cracking tendency of steel castings, especially for steels containing manganese, chromium, molybdenum and other elements.